Scriber attachment for a combination square

ABSTRACT

THIS INVENTION RELATES TO HAND TOOLS AND CONSISTS OF A RECTANGULAR STEEL BLOCK HAVING AN ELONGATED U-SHAPED RECESS THEREIN IN WHICH IS PLACED THE BLADE OF A COMBINATION SQUARE AFTER A STEEL PIN, HAVING A POINT AT EACH END THEREOF, IS PLACED IN CENTRALLY LOCATED OPENINGS IN THE AFORESAID STEEL BLOCK. ONE OF THE POINTED ENDS OF THE AFORESAID PIN PROJECTS OUT BEYOND ONE SIDE OF THE STEEL BLOCK WHILE THE OTHER POINTED END OF THE PIN PROJECTS OUT BEYOND THE OTHER SIDE OF THE SAME BLOCK, THE STEEL PIN BEING HELD IN PLACE IN THE BLOCK BY BOTH ONE END OF THE AFORESAID BLADE AND A SET SCREW THAT IS LOCATED IN THE BOTTOM OF THE OFTEN MENTIONED STEEL BLOCK. A SECOND SET SCREW SECURES THE AFORESAID BLADE FIRMLY IN THE STEEL BLOCK, THE SCRIBING BEING DONE BY THE OTHER TWO POINTS OF THE STEEL PIN.

Dec. 7, 1971 0, MAX 3,624,911

SCRIBER ATTACHMENT FOR A COMBINATION SQUARE Filed April 10, 1970 INVENTOR BERNARD D. MAX

United States Patent Oflice 3,624,91 l Patented Dec. 7, 1971 3,624,911 SCRIBER ATTACHMENT FOR A COMBINATION SQUARE Bernard D. Max, 312 Circleview Drive 8.,

Hurst, Tex. 76053 Filed Apr. 10, 1970, Ser. No. 2,316

Int. Cl. B431 13/02 U.S. Cl. 33-42 2 Claims ABSTRACT OF THE DISCLOSURE This invention relates to hand tools and consists of a rectangular steel block having an elongated U-shaped recess therein in which is placed the blade of a combination square after a steel pin, having a point at each end thereof, is placed in centrally located openings in the aforesaid steel block. One of the pointed ends of the aforesaid pin projects out beyond one side of the steel block while the other pointed end of the pin projects out beyond the other side of the same block, the steel pin being held in place in the block by both one end of the aforesaid blade and a set screw that is located in the bottom of the often mentioned steel block. A second set screw secures the aforesaid blade firmly in the steel block, the scribing being done by the two points of the steel pin.

As will be undersood from the above abstract of the disclosure, this invention is a hand tool, adapted for use by machinists and the like; still more particularly, it is a hand tool used by machinists for measuring and marking parts that are being made and assembled into tools and/ or machines and the like.

The background of this invention will be found in U.S. Pats. No. 345,196 issued to Vose; No. 493,062 issued to Bruno; and No. 1,353,682 issued to Viezzi.

It is the principal object of this invention to provide a scriber attachment for a combination square that will permit a machinist to make a desired mark on an object at a given plact without the necessity of making a second measure when using the combination square.

Another object of this invention is to provide a scriber attachment for a combination square, the attachment being provided with a double pointed pin that will permit either point to be used for scribing or if one point becomes damaged.

Still another object of this invention is to provide a scriber attachment for a combination square that can be used in connection with any machinist square regardless of the length of the blade being used therewith.

Other and further objects of this invention will no doubt appear as the reading of this specification and its appended claims proceeds and the accompanying drawing is examined.

In the drawing:

FIG. 1 is a pictorial exploded view of this invention and part of the blade of a combination square, the blade being shown in phantom lines.

FIG. 2 is a pictorial view of this invention ready for use, the blade of the combination square being shown in phantom lines.

FIG. 3 is a sectional view of this invention, taken substantially along line 3-3 of FIG. 2, and viewed in the direction indicated by the arrows.

In the several views of the drawing, like parts of this invention are indicated by like reference numbers.

This invention 5 embodies a rectangular steel block 6 having an elongated U-shaped recess 7 therein, the recess extending the full length of the block. Two tapped openings 8 and 9 are so located, one in each side of the longitudinal center of the steel block 6, that when the set screw 10 is screwed into one of the aforesaid openings 8 and 9, after the steel blade 11 of the combination square has been placed in the aforesaid recess 7, the set screw will firmly lock the blade in place by having one end rest in the elongated recess 12 of the often mentioned steel blade. The aforesaid steel block 6 is provided with a centrally located opening or bore 13 that extends laterally all the way through the block for the reception of the hardened tool steel pin 14. The pin 14 has a point 15 formed on one end, and a like point 16 formed on its other end. The pin 14 is provided with a centrally located U-shaped recess 17 adapted to receive one end of the aforesaid steel blade 11 when this invention is ready to be used. The aforesaid combination square is not shown in any of the views of the accompanying drawing for reasons of clarity. A set screw 18 is located in the tapped opening in the lateral and longitudinal center of the aforesaid steel block 6 in order to provide an additional lock for the steel pin 14 since the upper end of the set screw 18 rests against the underside of the just mentioned steel pin 14. It will be seen on examination of the accompanying drawing that when this invention is assembled, the steel points 15 and 16 project out beyond the sides 18 and 19 of the steel block 6.

From the foregoing description of this novel invention, it is obvious that this scriber attachment 5 is fitted on the end of the aforesaid blade 11 of any combination square. This invention will make it easier and faster for one to scribe a line, parallel to the edge of the material, on a piece of sheet metal or in fact on nearly any other material. The scriber attachment can be used on ferrous and non-ferrous sheets, plates, angles, Ts, squares, rectangles and the like as well as on plastic, fiber, wood, and the like of nearly any configuration. A good example in the use of this invention is the making of a tray having two inch high sides. The tray is to be made of galvanized 24 gage sheet material 10" x 14" in size. The normal way to do this is to set the square at 2", then work your 'way around the material, and then, using a regular straight scriber, mark oif eight places, two in each of the four corners. Next, use a straight edge to connect all of the scribe marks on the material. In place of a straight edge, one can reset the square to 3" or more, and extend the marks so that the corners can be notched out before bending. By using this novel invention of a scriber attachment for a combination square, one simply slips the invention 5 on the end of the often mentioned blade 11, tightens the set screws 10 and 18, and then adjusts the square to 2". This is done by holding the square in one hand and the sheet metal in the other hand and then running the face of the square along the edge of the metal. A line of any desired length can thus be scribed on the material at hand within a tolerance of .015 of an inch. Minimum distance from the edge of the scribed mark is in this instance of an inch. The maximum distance is determined by the length of the combination square blade 11 that is being used. All edges of this novel scriber attachment 11 should be rounded and the entire tool zin plated for protection against rust.

This invention is subject to any and all changes and/ or modifications one may care to make in the same in so long as the changes and/or modifications fall within the scope and intent of the appended claims.

What I now claim as new is:

1. A scriber attachment for a combination square having a blade, comprising a steel block having substantially parallel upper and lower surfaces and edges; the said block having an elongated U-shaped recess extending into one edge thereof, the recess having upper and loWer surfaces substantially parallel to said upper and lower surfaces of the block, the recess being proportioned to receive a portion of a steel blade of a combination square; 15

attachment is assembled on a blade, and a set screw threaded into said block to'contact said blade to retain the attachment and blade in assembled condition.

2. The invention of claim 1 wherein the bore is partly in the recess and partly in the block adjacent to the recess.

References Cited UNITED STATES PATENTS 149,761 4/1874 Lathrop 33-158 345,196 7/1886 Vose 33-27 CX 683,247 9/1901 Carter 33-42 832,996 10/1906 Nielsen 33-160 X 1,262,434 4/1918 Beeck 33-42 2,681,507 6/1954 Underwood 33-42 X FOREIGN PATENTS 914,329 7/ 1954 Germany 33-42 HARRY N. HAROIAN, Primary Examiner US. Cl. X.R. 33-189 

